OK, for the people who are scared for no reason, please read this.
All wired and wireless devices have MAC Addresses.
Any wireless device has to be able to touch any wireless router, that's how things work. However, that does not mean they are given access into your network. The only way they are given access into your network is after authenticating your SSID with the correct passphrase and only then will they be given an IP address.
Your Windows computer can sense these devices 'touching' your wireless router by their MAC address. That's about where it all ends. Your computer see's devices out there that are close enough to touch the wireless signal your router is putting out in the world. That in no way means they have been authenticated onto your network.
What could Microsoft do about this? Well perhaps they could install an option in networking to "Not Display Wireless Devices until authenticated through the router".
Just know that for Wi-Fi to work, every wireless device has the ability to ATTEMPT to connect to every other wireless device. That does not mean they are authenticated on that Wireless Network connection. Windows is so smart that it see's these devices and puts that information in the "Network" devices page.
I see a neighbors Vizio TV and HTC phone randomly in my "Network Devices" and when I right click and choose properties only the devices "Brand Name and/or Model" and "MAC address" are listed. This is perfectly normal. It is my PC seeing wireless devices out there through my router, NOT wireless devices out there seeing into my network.
Even if you block that MAC address from connecting to your network in your router settings, that device still has to "Touch" your router, once that happens it will be blocked from obtaining an IP address even if it has the right credentials to connect. Windows will always be able to see devices touching your router.
Just remember to never leave your Wi-Fi "OPEN" without passphrase protection and you're going to be ok.
There is no evidence anywhere that wireless or WiFi is relevant here. Any explanation that uses wireless or WiFi is not relevant. Hackers get in when they can be smarter than the rest of us.
